Periodicals 62 Ordnance 9 Weapon systems 9 Weapons systems 8 Equipment 7 Warships 7 Armoured vehicles, Military 6 Equipment and supplies 6 Firearms 6 Infantry 6 Submarine warfare 6 Vehicles, Military 6 Air defences, Military 5 Radar 5 Aeronautics 4 Airplanes 4 Artillery 4 Logistics 4 Military supplies 4 Airplanes, Military 3 Armed Forces 3 Armored vehicles, Military 3 Navies 3 Tanks (Military science) 3 Weapons system 3 Yearbooks 3 Aeromatics 2 Aeronautics, Military 2 Aeroplanes 2 Air defenses,Military 2